| The response of photosynthesis and stomatal conductance to rising [CO2]: mechanisms and environmental interactions. | |
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MedLine Citation:
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PMID: 17263773 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This review summarizes current understanding of the mechanisms that underlie the response of photosynthesis and stomatal conductance to elevated carbon dioxide concentration ([CO2]), and examines how downstream processes and environmental constraints modulate these two fundamental responses. The results from free-air CO2 enrichment (FACE) experiments were summarized via meta-analysis to quantify the mean responses of stomatal and photosynthetic parameters to elevated [CO2]. Elevation of [CO2] in FACE experiments reduced stomatal conductance by 22%, yet, this reduction was not associated with a similar change in stomatal density. Elevated [CO2] stimulated light-saturated photosynthesis (Asat) in C3 plants grown in FACE by an average of 31%. However, the magnitude of the increase in Asat varied with functional group and environment. Functional groups with ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco)-limited photosynthesis at elevated [CO2] had greater potential for increases in Asat than those where photosynthesis became ribulose-1,5-bisphosphate (RubP)-limited at elevated [CO2]. Both nitrogen supply and sink capacity modulated the response of photosynthesis to elevated [CO2] through their impact on the acclimation of carboxylation capacity. Increased understanding of the molecular and biochemical mechanisms by which plants respond to elevated [CO2], and the feedback of environmental factors upon them, will improve our ability to predict ecosystem responses to rising [CO2] and increase our potential to adapt crops and managed ecosystems to future atmospheric [CO2]. |
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Authors:
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Elizabeth A Ainsworth; Alistair Rogers |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Review |
Journal Detail:
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Title: Plant, cell & environment Volume: 30 ISSN: 0140-7791 ISO Abbreviation: Plant Cell Environ. Publication Date: 2007 Mar |
Date Detail:
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Created Date: 2007-01-31 Completed Date: 2007-04-10 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 9309004 Medline TA: Plant Cell Environ Country: United States |
Other Details:
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Languages: eng Pagination: 258-70 Citation Subset: IM |
Affiliation:
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USDA/ARS Photosynthesis Research Unit and Department of Plant Biology, University of Illinois Urbana-Champaign, 147 ERML, 1201 W. Gregory Drive, Urbana, IL 61801, USA. ainswort@uiuc.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Carbon Dioxide
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metabolism* Environment Photosynthesis* Plant Physiological Phenomena Ribulose-Bisphosphate Carboxylase / metabolism |
| Chemical | |
Reg. No./Substance:
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124-38-9/Carbon Dioxide; EC 4.1.1.39/Ribulose-Bisphosphate Carboxylase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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